#条件判断 if else
# 三个输入数字相加：（0-6）小、（7-12）中、（13-18）大

randomNum1 = input("Enter a random number(0-6): ")
randomNum2 = input("Enter another random number(0-6): ")    
randomNum3 = input("Enter a third random number(0-6): ")

sum_of_numbers = int(randomNum1) + int(randomNum2) + int(randomNum3)
if sum_of_numbers <= 6:
    print("The sum is small.") 
elif 7 <= sum_of_numbers <= 12:
    print("The sum is medium.")
else:
    print("The sum is large.")  